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1 Focussing on Inequalities: Variation in breast cancer outcomes with age and deprivation West Midlands Cancer Intelligence Unit

2 ACKNOWLEDGEMENTS ACKNOWLEDGEMENTS Acknowledgements ACKNOWLEDGEMENTS The authors of this report: Dr Gill Lawrence Ms Olive Kearins Dr Catherine Lagord Ms Shan Cheung Dr Jasmin Sidhu Mr Colin Sagar Director, West Midlands Cancer Intelligence Unit Regional Director of Breast Screening Quality Assurance Deputy Regional Director of Breast Screening Quality Assurance West Midlands Breast Screening QA Reference Centre Breast Cancer Audit Project Manager West Midlands Cancer Intelligence Unit Breast Screening QA Senior Information Analyst West Midlands Breast Screening QA Reference Centre Breast Cancer Data Analyst West Midlands Cancer Intelligence Unit BCCOM Information Assistant West Midlands Cancer Intelligence Unit would like to express their thanks to the following organisations and individuals for their contributions to the second All Breast Cancer Report ; UK cancer registries which provided the core 2007 data on all breast cancers diagnosed in their populations. English regional breast screening QA reference centres which provided the identifiers to enable the screen-detected cancers originally submitted to the NHS Breast Screening Programme audit of screendetected cancers to be matched to the cancer registry data. Mr Alan MacDonald, Computer Information Systems Development Specialist at the West Midlands Cancer Intelligence Unit who undertook the matching of the various datasets. Dr Yoon C Chia, Consultant Pathologist at Wycombe Hospital who provided pathology graphics for this report. Breast surgeons across the UK who checked and submitted data into the NHS Breast Screening Programme / Association of Breast Surgery audit of screen-detected breast cancer and to the Breast Cancer Clinical Outcome Measures (BCCOM) audit (see Appendix 1) The authors would also like to express their thanks to the National Cancer Intelligence Network for their financial assistance in the production of this report.

3 Foreword Foreword This is the second All Breast Cancer Report and draws information from a number of sources on over 50,000 people with newly diagnosed breast tumours in the UK in 2007, of whom 89% had invasive disease. Despite a continuing overall improvement in UK breast cancer outcomes, significant differences remain in the presentation and management of the disease that are associated with age, deprivation and ethnicity. This report focuses on the differences related to age and deprivation. It sends out clear messages on variations in treatment and differences in outcome and shows where we can focus our attention to address variations in stage at diagnosis and treatment provided. There are some very positive messages on experience and outcome that demonstrate real improvements for patients: rates of breast conservation surgery are high, immediate breast reconstruction is being performed more often for women undergoing mastectomy, and 1-year and 5-year relative survival rates are increasing. The beneficial impact of the NHS Breast Screening Programme is clearly apparent in the predominance of cancers that are small at diagnosis, and in its effect of reducing the inequalities associated with age and deprivation. Whilst I very much welcome this report, and commend the detailed and dedicated work that has been put in to produce it, there is a concern that it is based on UK data from If we are to be more effective in the future in reducing variation and dealing with inequality, we will require information that is more contemporaneous, and it is therefore encouraging to know that a more streamlined approach to national cancer data collection is being developed that should enable zthis. Mr Martin Lee Chair, National Cancer Intelligence Network Breast Clinical Reference Group FOREWORD i

5 Executive Summary Executive Summary Introduction There is an increasing need to publish data on the outcomes of care - what actually happens to the health of the patient as a result of the treatment and care they receive. In order to place a stronger focus on clinical issues, the National Cancer Peer Review Evidence Guide published in February 2010 introduced clinical lines of enquiry into the review process. In this, the second All Breast Cancer Report, as well as including chapters on cohort and tumour characteristics similar to those in the first All Breast Cancer Report, we have focussed on surgical treatment and how this varies with age, deprivation and route of presentation. The analyses include, for breast cancers diagnosed in women in 2007, the cancer peer review headline clinical indicators: access to immediate reconstruction ratio of mastectomy to breast conserving surgery surgical caseload average length of stay 1-year and 5-year relative survival rates. The report also includes analyses on the use of sentinel lymph node biopsy repeat operations 30 day mortality. Cohort Characteristics Of the 50,286 of invasive (44,782; 89%) and non/ micro-invasive (5,490; 11%) breast cancer diagnosed in the UK in 2007, 292 (0.6%) were diagnosed in men. 81% were diagnosed in patients aged 50 and over, and 32% of all breast cancers and 56% of breast cancers diagnosed in women between the ages of 50 and 69 years, were screen-detected. Breast cancer increases with affluence; 23% of were diagnosed in the least deprived group compared with 15% in the most deprived group. Three quarters of in English women were diagnosed in White women (20% unknown ethnicity). Tumour Characteristics Of the surgically treated invasive breast cancers, 58% were small with an invasive tumour size of 20mm or less, 17% were grade 1, 62% were lymph node negative, 39% were in the excellent (EPG) and good (GPG) Nottingham Prognostic Index prognostic groups, 29% had vascular invasion, 84% were ER positive and 15% were HER2 positive. Screen-detected invasive breast cancers were more likely to be smaller in size, of a lower grade, node negative and in the EPG and GPG prognostic groups. Screen-detected cancers were also less likely to have vascular invasion, more likely to be ER positive and less likely to be HER2 positive. These differences between symptomatic and screen-detected cancers were evident across all ages and deprivation quintiles. Compared with women in the screening age group, older women were more likely to have node negative cancers, and less likely to have small cancers, HER2 positive cancers and vascular invasion present. Women aged less than 40 were less likely to have grade 1 tumours and cancers in the EPG and GPG prognostic groups and more likely to have vascular invasion present. For symptomatic invasive breast cancers, the proportions with good prognosis (small, node negative, ER positive, EPG and GPG prognostic groups) decreased with increasing deprivation. Equivalent trends were not apparent for screen-detected cancers, indicating that screening reduces the observable inequalities in tumour characteristics associated with deprivation. EXECUTIVE SUMMARY 1

6 Executive Summary Executive Summary Surgical Treatment 82% of women diagnosed with breast cancer in 2007 had surgery, and 57% of those had a breast conserving procedure. Significantly more women with screendetected breast cancer had surgery (98% compared with 75% for those presenting symptomatically), and significantly fewer had a mastectomy (27% compared with 53%). Of the 524 surgeons who treated female breast cancer patients in 2007, 139 (27%) had a caseload of less than 30 patients, 27 had a significantly high mastectomy rate and 44 a significantly low mastectomy rate. For symptomatic breast cancers, surgical treatment decreased with age at diagnosis; with only 74% of women aged and 39% of women aged 80 and above having surgery compared with 90% of women aged under 50. Women in the most deprived quintile were less likely to have surgery than those in the least deprived quintile (72% compared with 78%). This effect was not apparent for women with screen-detected breast cancers. Overall, 11% of female mastectomy patients had immediate reconstruction. A greater proportion of non/ micro-invasive cancers had immediate reconstruction (27% compared with 10% of invasive cancers), and women with screen-detected cancers were more likely to have an immediate reconstruction (16% versus 10%). For screen-detected cancers, immediate reconstruction was more likely to be undertaken in women from a less deprived background. 32% of women had a sentinel lymph node biopsy (SLNB). Older women were less likely to have a SLNB. The median length of stay for female mastectomy patients was 4 days compared to 2 days for women having breast conserving surgery. Screening patients had a shorter length of stay, mainly because more were treated with breast conserving surgery. Repeat operation rates were higher for non/micro-invasive cancers (25% compared with 14% for invasive cancers), for women with screen-detected cancer (18%) and for younger women (19%). 860 women (2%) died within 30 days of their diagnosis. 51% of these were death certificate only (DCO). Of the non-dco who died within 30 days, 64% died of breast cancer. A significantly higher proportion of women in the most deprived quintile died within 30 days of their cancer diagnosis. Survival 1-year relative survival was significantly higher for women diagnosed with breast cancer in 2007 (96% compared to 94% in 2002/03). 1-year and 5-year relative survival rates were significantly higher for women with screen-detected breast cancer (100% compared to 93%- 94% at 1 year and 97% compared to 77% at 5 years). For women with symptomatic breast cancer, 5-year relative survival decreased with age (from 86% in women aged years to only 62% in women aged 80 years and above). For women with symptomatic breast cancer, there were marked decreases in 1-year survival with deprivation (from 90%-92% for the most deprived women to 96%- 97% for the least deprived women). These differences were not apparent for women with screen-detected breast cancer. Although 5-year relative survival for women with screen-detected cancer did decrease from 99% in the least deprived to 94% in the most deprived, there was a much more marked difference for women with symptomatic breast cancer; 5-year relative survival being 83% in the least deprived and 68% in the most deprived. Screening thus appears to reduce the observable inequalities in 1-year and 5-year relative survival associated with deprivation. 2 EXECUTIVE SUMMARY

7 Introduction Introduction and Data Sources Introduction There is an increasing need to publish data on the outcomes of care - what actually happens to the health of the patient as a result of the treatment and care they receive. The White Paper Equity and Excellence: Liberating the NHS 1 sets out how improvements in outcomes will in future be the primary focus of the NHS. The associated document Liberating the NHS: Transparency in outcomes; a framework for the NHS 2 discusses how these outcomes will be measured. Breast cancer is, in some ways, ahead of the crowd in having clinical outcome measures defined by the Breast Cancer Clinical Outcome Measures (BCCOM) Project and an established track record of audit and reporting the processes of care at national level for screen-detected and symptomatic breast cancers. How breast cancer outcomes will be measured in future at national level will become clearer when the National Institute for Health and Clinical Excellence (NICE) Quality Standards for Breast Cancer 3 are published later this year. In order to place a stronger focus on clinical issues to make cancer peer review clinically relevant and to sustain the continued support and involvement of clinical staff, the National Cancer Peer Review Evidence Guide published in February introduced clinical lines of enquiry into the review process. As part of this initiative, a number of headline clinical indicators were agreed with the National Cancer Intelligence Network (NCIN) Breast Clinical Reference Group (CRG), some of which are based on data collected at a national level. In this, the second All Breast Cancer Report as well as including chapters on cohort and tumour characteristics similar to those in the first All Breast Cancer Report 5, we have focussed on surgical treatment and how this varies with age, deprivation status and route of presentation. The analyses include the cancer peer review headline clinical indicators: access to immediate reconstruction ratio of mastectomy to breast conserving surgery surgical caseload average length of stay 1-year and 5-year relative survival rates. The report also includes analyses on the use of sentinel lymph node biopsy repeat operations 30 day mortality. Data Sources Data from the different sources were linked using NHS number and amalgamated to produce a single record for each patient. Cancer registry data Population based data on the diagnosis, treatment and survival of breast cancer in the United Kingdom (UK) are collected by cancer registries in eight English regions and in Northern Ireland, Scotland and Wales (the Celtic countries). The dataset collected is defined in the Cancer Registration Minimum Data Set 6. HES data Hospital Episode Statistics (HES) 7 record details of the care provided by NHS hospitals in England. Information on patient age, gender and ethnicity, clinical diagnoses and operations, time waited and admission dates are recorded in HES. Details of selfreported ethnicity, surgery, chemotherapy and selected patient demographics from HES were used to supplement the cancer registry data. In Northern Ireland, hospital information is obtained from the Decision Support System through the cancer registry database. The Patient Episode Database for Wales (PEDW) records all episodes of inpatient or daycase activity in NHS Wales hospitals. The primary source of hospital level information in Scotland is the Scottish Morbidity Record (SMR01) which contains hospital inpatient or daycase discharge records. INTRODUCTION AND DATA SOURCES 3

8 Introduction Introduction and Data Sources ONS data The Office for National Statistics (ONS) collates data held by the English regional cancer registries and the Welsh Cancer Intelligence and Surveillance Unit to give aggregated data for England and Wales. The ONS cancer registration dataset contains patient demographics, some tumour characteristics and treatment flags indicating that the patient has had surgery, radiotherapy and/or chemotherapy. The ONS and HES datasets, were combined to obtain a database of all registered breast cancer patients, their demographics and their in-patient treatment. Indices of Multiple Deprivation The Index of Multiple Deprivation 2007 (ID2007) combines a number of indicators, covering a range of economic, social and housing issues, into a single deprivation score for each small area in England. This allows each area to be ranked according to its level of deprivation. ID2007 scores are produced at Lower Super Output Area (LSOA) level, of which there are 32,482 in England 8. The income domain score was used as the deprivation indicator for England in this report. Income domain scores are grouped into 5 ranges (quintiles), each containing one fifth of the English population. To obtain an indication of the deprivation status of each breast cancer patient, postcode of residence was linked to the income domain score for the small area in which the patient lived at the time of diagnosis. Patients were then allocated to a deprivation quintile based on their score. The Northern Ireland Cancer Registry uses the Output Area (OA) level Economic Deprivation Measure of the Northern Ireland Multiple Deprivation Measure (NIMDM) 2005 to derive deprivation scores. This measure combines income, employment and proximity to services domains, and used in conjunction with the patient s postcode was put into deprivation quintiles. The Welsh Cancer Intelligence and Surveillance Unit uses the Welsh Index of Multiple Deprivation (WIMD) 2008 to derive deprivation scores. The LSOA of the patient s residence was used to assign a quintile based upon the income domain using equal population in each quintile. In Scotland, patient postcodes are utilised in the generation of the Scottish Index of Multiple Deprivation (SIMD) 2006 which is then used to derive deprivation scores. BCCOM audit validated data Each year, to initiate the Breast Cancer Clinical Outcome Measures (BCCOM) audit, data for symptomatic breast cancers are downloaded from the UK cancer registries. The data are then sent to individual surgeons for validation. Validated data are returned to the WMCIU for analysis. In this report, where altered data were returned by surgeons in England, Wales and Northern Ireland, these have been used in the analysis in preference to the original cancer registration data. Data for Scotland were provided by the Information and Statistics Division Scotland which has managed the Scottish Cancer Registration scheme since NHSBSP/ABS validated data Data for the UK NHS Breast Screening Programme (NHSBSP) and Association of Breast Surgery (ABS) audit of screen-detected breast cancer are initially downloaded from the National Breast Screening System (NBSS) or other breast screening computer systems. Data are checked and signed off by the responsible surgeons and the regional breast screening QA reference centres prior to their inclusion in the audit. These data were used to assign a screendetected flag to. 4 INTRODUCTION AND DATA SOURCES

9 Cohort Characteristics Cohort Characteristics Key Findings o In the UK in 2007, 50,286 new of invasive and non/micro-invasive breast cancer were registered. 44,782 were invasive (89%) and 5,490 (11%) were non-invasive or micro-invasive. o 292 new breast cancers (0.6%) were diagnosed in men. o 81% of new breast cancers were diagnosed in patients aged 50 and over. o In women, 32% of all breast cancers and 56% of breast cancers diagnosed between the ages of 50 and 69 years were screen-detected. o There was a marked relationship between deprivation and breast cancer incidence; with only 14-17% of breast cancers being diagnosed in people in the most deprived quintile compared with 20-23% in the least deprived quintile. o Deprivation profiles varied to some extent with age at diagnosis, with patients aged less than 40 being more evenly distributed across the deprivation quintiles than other age groups, and significantly fewer patients aged 75 and over in the least deprived quintile (19% compared to 24% under 75). o In women known to be Black, 46% of breast cancers were diagnosed under the age of 50. Conversely, 30% of breast cancers in women known to be White were diagnosed in those aged 70 and over. o 75% of women with breast cancer known to be Black and 62% of women known to be Asian were in the two most deprived quintiles (Q1 and Q2). In contrast, 45% of women with breast cancer known to be White and 40% of women known to be Chinese were in the two least deprived quintiles (Q4 and Q5). o Only 20% of women known to be Black had screen-detected breast cancers compared to 32% of all women. Country Profile A total of 50,286 of invasive and non/micro-invasive breast cancer diagnosed in the UK in 2007 are included in this report. Of these, 83.4% were diagnosed in England, 2.5% in Northern Ireland, 8.8% in Scotland and 5.3% in Wales. 49,994 breast cancers were diagnosed in women (99.4%) and 292 in men (0.6%). Details of the number of breast cancers diagnosed in women and men in each English region and Celtic country are given in Table 1. English Region/ Celtic Country Population Covered (million) No. Breast Cancers in 2007 % Breast Cancers in UK Men Women Total Eastern ,800 4, % North West ,394 5, % Northern & Yorkshire ,492 5, % Oxford ,236 2, % South West ,698 6, % Thames ,434 8, % Trent ,945 3, % West Midlands ,710 4, % England ,709 41, % Northern Ireland ,269 1, % Scotland ,382 4, % Wales ,634 2, % UK ,994 50,286 Table 1: English region and Celtic country profiles COHORT CHARACTERISTICS 5

10 Cohort Characteristics Cohort Characteristics Cases in deprivation quintiles (%) 100% 80% 60% 40% 20% 0% Eastern North West Northern & Yorkshire Oxford South West Thames Trent West Midlands England Northern Ireland Scotland Most deprived Q2 Q3 Q4 Least deprived Wales UK Figure 1: Proportion of breast cancer in each region in each deprivation group In England as a whole, there was a marked relationship between deprivation and breast cancer incidence; with only 14% of breast cancers being diagnosed in people in the most deprived quintile compared with 23% in the least deprived quintile (Figure 1). Each deprivation quintile covers 20% of the English population. The proportion of breast cancers diagnosed in the most deprived group is significantly smaller that the expected 20% and the proportion in the least deprived group significantly in excess. This implies that people in the least deprived population are more likely to be diagnosed with breast cancer. The large regional differences in the proportions of breast cancer diagnosed in each deprivation quintile within England reflect the marked variation in deprivation levels between the regions; the Eastern, Oxford and South West regions being less deprived compared to the rest of the England. The proportions of breast cancer in the five deprivation groups in the Celtic countries are similar to those in England; with a higher proportion diagnosed in people in the least deprived quintile (20%-22% compared with 16-17% in the most deprived quintile). Age, Gender and Deprivation The cohort of patients diagnosed with breast cancer in 2007 had an age distribution ranging from 17 to 103 years. 81% of breast cancers were diagnosed in patients aged 50 and over (Table 2). The median age at diagnosis in men was higher than in women (72 compared to 62); 54% of breast cancers were diagnosed in men aged 70 and over compared with 31% in women. Men diagnosed with breast cancer were less likely to have non-invasive or micro-invasive tumours (7.9% compared to 10.9%), but this difference was not statistically significant. Because of the small number of micro-invasive breast cancers and because they are treated in a similar way, in the remainder of this report, non-invasive and microinvasive breast cancers have been combined into a single non/micro-invasive category. 6 COHORT CHARACTERISTICS

12 Cohort Characteristics Cohort Characteristics The flat deprivation profile for women aged less than 40 seen in Figure 2 may reflect the relatively high proportion of these cancers which are familial rather than being linked to the lifestyle factors which are believed to influence the incidence of sporadic breast cancer. The decrease in the proportion of breast cancers in the two least deprived quintiles in women aged 75 and over may be due to the earlier diagnosis by the NHS Breast Screening Programme of breast cancers that would have occurred in this age group. Because of the relatively small number of breast cancers diagnosed in men, the remainder of this report includes only breast cancers diagnosed in women. A future publication on breast cancer in men is planned which will include data aggregated over a number of years. Route of Presentation Of the 49,994 female breast cancers diagnosed in 2007, 15,783 (32%) were detected by the NHS Breast Screening Programme. The majority were diagnosed in women in the screening age range (50-70 years in 2007), with a small number detected in women aged less than 50 who were called early to screening to ensure that they would be invited before they were aged 53, and 416 in women aged 75 years and over who had self-referred for screening. The age distribution of screen-detected and symptomatic breast cancers diagnosed in women in the UK in 2007 is shown in Figure 3. 50% of all breast cancers were diagnosed in women between the ages of 50 and 69 years, and 56% of these were screen-detected. Although 31% of all breast cancers in women were diagnosed in patients aged 70 and over, only 7% of these were screendetected. 2% of breast cancers diagnosed in women aged less than 50 were detected via screening. In England, 5% of female breast cancer patients (2,176 women) were years old at diagnosis, and a further 5% (1,914 women) were years old. These groups of women are covered by the extension of the NHS Breast Screening Programme outlined in the Cancer Reform Strategy and therefore, in future, more breast cancers in these age groups may be screen-detected < Number of Age band Screen-detected Figure 3: Age profile and route of presentation for women diagnosed with breast cancer in COHORT CHARACTERISTICS

14 Cohort Characteristics Cohort Characteristics In women of known Black ethnicity, 46% of breast cancers were diagnosed under the age of 50, compared to 32% in women known to be Chinese or of Mixed ethnicity, 28% in women known to be Asian and 18% in women known to be White. Conversely, 30% of breast cancers in women known to be White were diagnosed in those aged 70 and over compared with 9-17% of women known to be Chinese, Asian, Black or of Mixed ethnicity. These differences will in part reflect differences in age distribution in the minority ethnic groups compared to the White population and have not been examined further in this report. 75% of women diagnosed with breast cancer known to be Black and 62% of women known to be Asian were in the two most deprived quintiles (Q1 and Q2) compared to 33% of women known to be White, 40% of women known to be Chinese and 50% of women known to be of Mixed ethnicity. In contrast, 45% of women diagnosed with breast cancer known to be White and 40% of women known to be Chinese were in the two least deprived quintiles (Q4 and Q5) compared with 32% of women known to be of Mixed ethnicity, 22% of women known to be Asian and 13% of women known to be Black. As noted in the first All Breast Cancer Report 5, women known to be Chinese had a higher proportion of non/micro-invasive cancers (19% compared to 11% in the rest of England), but this difference is not statistically significant. Only 20% of women known to be Black had screendetected breast cancers compared to 32% of all women. The low proportion of women of known Black ethnicity with screen-detected breast cancer may in part be explained by the relatively high proportion of cancers (46%) diagnosed in these women under the age of 50. However, there were also relatively high proportions of breast cancers diagnosed in women under the age of 50 known to be Asian (28%), Chinese (32%) or of Mixed ethnicity (32%), and 31-35% of their cancers were screen-detected so this cannot be the only reason. The remainder of this report does not include analyses for individual ethnic groups. A future publication on breast cancer and ethnicity is planned which will include data aggregated over a number of years to allow more meaningful analysis of the differences between the minority ethnic groups. 10 COHORT CHARACTERISTICS

15 Tumour Characteristics Tumour Characteristics Key Findings o Of the surgically treated women diagnosed with invasive breast cancer with known tumour characteristics, 58% had small cancers with an invasive tumour size of 20mm or less, 17% were diagnosed with grade 1 tumours, 62% had lymph node negative tumours, 39% had tumours in the excellent (EPG) and good (GPG) Nottingham Prognostic Index groups, 29% had vascular invasion, 84% had ER positive tumours and 15% had HER2 positive tumours. o Screen-detected invasive breast cancers were more likely to be smaller in size, of a lower grade, node negative and in the EPG and GPG prognostic groups. These cancers were also less likely to have vascular invasion, more likely to be ER positive and less likely to be HER2 positive. These differences between symptomatic and screendetected cancers were evident across all ages and deprivation quintiles. o Older women diagnosed symptomatically, were more likely to have node negative cancers and EPG/GPG cancers, and less likely to have small cancers, HER2 positive cancers and vascular invasion present. Older women diagnosed via screening were also more likely to have node negative cancers, and less likely to have HER2 positive cancers and vascular invasion. o Women aged less than 40 diagnosed symptomatically were less likely to have grade 1 tumours and cancers in the EPG and GPG prognostic groups, and more likely to have vascular invasion present. o For symptomatic invasive breast cancers, the proportions of small cancers, node negative cancers, cancers in the EPG and GPG prognostic groups and ER positive cancers decreased with increasing deprivation. Equivalent trends were not apparent for screen-detected invasive breast cancers indicating that screening reduces the observable inequalities associated with deprivation. Tumour Characteristics Tumour characteristics data were available for the whole of the UK. Tables summarising the completeness of each data item for invasive breast cancers diagnosed in each English region and Celtic country are provided in Appendix 3. Variations in tumour size, degree of spread, aggressiveness and receptor status are considered in terms of age at diagnosis, deprivation and presentation route in women diagnosed with invasive breast cancer in Breast cancers in men have been excluded from this section and the remainder of the report, as has the effect of ethnicity on tumour characteristics and treatment outcomes. Invasive Tumour Size In the UK, invasive tumour size was known for 76% of all invasive cancers and for 89% of surgically treated invasive cancers. The former varied from 41% in the Trent region to 90% in the Eastern region, and the latter from 53% in the Trent region to 98% in the West Midlands region (Appendix 3). TUMOUR CHARACTERISTICS 11

16 Tumour Characteristics Tumour Characteristics Age Band (years) Invasive Cancers Tumour Size 20mm or less All Total no. < % 48.4% % 49.2% 49.8% % 47.8% 64.3% % 49.4% 68.1% % 41.1% 49.7% % 36.2% 37.3% 2216 All ages 78.4% 45.8% 58.2% Screendetected Deprivation Quintile Invasive Cancers Tumour Size 20mm or less Screendetected All Total no. Q1 Most deprived 76.7% 42.9% 54.7% 4589 Q2 78.9% 44.1% 56.6% 5826 Q3 79.2% 45.1% 57.9% 6760 Q4 78.7% 48.0% 60.2% 7388 Q5 Least deprived 78.2% 47.5% 60.0% 7478 All 78.4% 45.8% 58.2% Tables 4a and 4b: Variation in the proportion of surgically treated small (maximum diameter 20mm or less) invasive breast cancers with a) age and route of presentation and b) deprivation quintile and route of presentation expressed as a proportion of the cancers with known invasive tumour size Overall, 58% of surgically treated women diagnosed with invasive breast cancer in 2007 had small cancers with an invasive tumour size 20mm or less (Table 4a). The proportion of screen-detected cancers with an invasive tumour size 20mm or less was significantly higher than that for symptomatic cancers (78% compared to 46%). Women aged 70 years and older who presented symptomatically were less likely to be diagnosed with a small cancer (41% in women aged and 36% in women aged 80 or over). Women aged 80 and over were less likely to have small tumours regardless of their route of presentation. This difference was statistically significant for symptomatic but not screen-detected. The proportions of surgically treated women with small (20mm or less) invasive breast cancers were lowest in the most deprived quintile for both screendetected and symptomatic cancers (Table 4b), but in every quintile the proportion of small (20mm or less) breast cancers was significantly higher for screendetected cancers. For symptomatic cancers there is a statistically significant relationship between the proportion of small (20mm or less) invasive cancers and deprivation. The proportion of small (20mm or less) invasive cancers increased from 43% in the most deprived quintile to 48% in the two least deprived quintiles. This relationship is not apparent for screendetected cancers. Invasive Tumour Grade Invasive tumour grade was known for 90% of all invasive cancers and for 97% of surgically treated invasive cancers. The former varied from 85% in Northern Ireland to 94% in the Oxford region, and the latter from 93% in Northern Ireland to 99% in the Oxford and West Midlands regions (Appendix 3). 12 TUMOUR CHARACTERISTICS

17 Tumour Characteristics Tumour Characteristics Age Band (years) Invasive Cancers Grade 1 All Total no. <40-5.9% 5.9% % 10.7% 11.1% % 11.3% 20.4% % 11.0% 20.1% % 11.5% 14.6% % 11.5% 11.8% 2510 All ages 27.2% 10.7% 16.5% Screendetected Deprivation Quintile Invasive Cancers Grade 1 Screendetected All Total no. Q1 Most deprived 24.8% 10.6% 15.2% 4957 Q2 26.1% 10.7% 15.7% 6341 Q3 29.2% 10.4% 17.0% 7275 Q4 27.0% 10.7% 16.6% 7991 Q5 Least deprived 27.7% 11.2% 17.4% 8100 All 27.2% 10.7% 16.5% Tables 5a and 5b: Variation in the proportion of surgically treated grade 1 invasive breast cancers with a) age and route of presentation and b) deprivation quintile and route of presentation expressed as a proportion of the cancers with known grade Grade 1 cancers are known to have a better prognosis than higher grade disease. Overall, 17% of surgically treated women diagnosed with invasive breast cancer in 2007 had a grade 1 cancer (Table 5a). The proportion of screen-detected grade 1 cancers was significantly higher than that for symptomatic cancers (27% compared to 11%). The proportion of grade 1 cancers varied with age at diagnosis for both presentation routes. Women aged less than 40 with symptomatic cancers had a significantly smaller proportion of grade 1 tumours (6%), as did women aged 80 or over with screendetected cancers (22%) but, for the latter age group, this variation was not statistically significant. The proportions of surgically treated women with grade 1 cancers were significantly higher for screen-detected tumours in all deprivation quintiles (Table 5b). There was no overall trend across the deprivation quintiles for either screendetected or symptomatic cancers. Nodal Status Within the UK, the nodal status of invasive cancers was known for 66% of all invasive cancers and for 80% of surgically treated invasive cancers. The former varied from 45% in Wales to 84% in Northern Ireland, and the latter from 52% in the Trent region to 96% in the West Midlands region and Scotland (Appendix 3). TUMOUR CHARACTERISTICS 13

18 Tumour Characteristics Tumour Characteristics Age Band (years) Invasive Cancers Negative Nodal Status All Total no. < % 45.8% % 47.8% 48.6% % 48.9% 64.6% % 52.0% 70.0% % 52.9% 59.8% % 50.9% 51.6% 1613 All ages 77.5% 50.0% 61.6% Screendetected Deprivation Quintile Invasive Cancers Negative Nodal Status Screendetected All Total no. Q1 Most deprived 75.4% 47.6% 58.7% 3959 Q2 77.4% 48.4% 60.1% 5100 Q3 79.8% 50.1% 62.3% 6096 Q4 76.6% 51.3% 62.4% 6648 Q5 Least deprived 77.6% 50.9% 62.8% 6758 All 77.5% 49.9% 61.6% Tables 6a and 6b: Variation in the proportion of surgically treated node negative invasive breast cancers with a) age and route of presentation and b) deprivation quintile and route of presentation expressed as a proportion of the cancers with known nodal status Node negative breast cancers are known to have a better prognosis than node positive cancers. In 2007, 62% of surgically treated women diagnosed with invasive breast cancer had node negative cancers (Table 6a). The proportion of screen-detected node negative cancers was significantly higher than the proportion of symptomatic cancers (78% compared to 50%). For symptomatic cancers there is a statistically significant increase in the proportion of node negative cancers with increasing age at diagnosis. Node negative cancers increased from 46% in women aged less than 40 to 53% in those aged A similar statistically significant relationship is also apparent for screen-detected cancers up to the age of years. Women aged 80 and over with screen-detected cancers had a smaller proportion of node negative cancers (71%), but this difference is not statistically significant. The proportions of surgically treated women with node negative invasive breast cancers were significantly higher for screen-detected cancers in all deprivation quintiles (Table 6b). For surgically treated women with symptomatic cancers, there is a statistically significant increase in the proportion of node negative cancers with decreasing deprivation. The proportion of node negative cancers increased from 48% in the most deprived quintile to 51% in the two least deprived quintiles. This relationship is not apparent for screendetected cancers. Nottingham Prognostic Index (NPI) The Nottingham Prognostic Index (NPI) 10 is used to determine the prognosis of surgically treated invasive breast cancers. An NPI score is calculated using three pathological criteria: invasive size, number of involved nodes and tumour grade. The scores can be grouped into five distinct prognostic groups: Excellent (EPG), Good (GPG), Moderate 1 (MPG1), Moderate 2 (MPG2) and Poor (PPG). In the UK as a whole, the Nottingham Prognostic Index was known for 63% of all invasive cancers and 76% of surgically treated invasive cancers. The former varied from 40% in Trent to 79% in the West Midlands region, and the latter from 51% in the Trent region to 95% in the West Midlands region (Appendix 3). 14 TUMOUR CHARACTERISTICS

19 Tumour Characteristics Tumour Characteristics Age Band (years) Invasive Cancers EPG/GPG All Total no. < % 14.8% % 23.6% 24.8% % 23.4% 43.5% % 25.6% 49.0% % 26.0% 35.4% % 25.5% 26.2% 1562 All ages 58.9% 24.0% 39.1% Screendetected Deprivation Quintile Invasive Cancers EPG/GPG Screendetected All Total no. Q1 Most deprived 54.6% 20.1% 34.3% 3808 Q2 58.7% 22.5% 37.5% 4889 Q3 61.6% 24.4% 40.1% 5872 Q4 57.8% 25.9% 40.2% 6370 Q5 Least deprived 60.0% 25.1% 41.1% 6461 All 58.9% 23.9% 39.1% Tables 7a and 7b: Variation in the proportion of surgically treated invasive breast cancers in the Excellent (EPG) and Good (GPG) NPI groups with a) age and route of presentation and b) deprivation quintile and route of presentation expressed as a proportion of the cancers with known NPI Overall, 39% of surgically treated women diagnosed with invasive breast cancer in 2007 had EPG or GPG cancers (Table 7a). The proportion of EPG/GPG cancers was significantly higher in the screen-detected cohort than for symptomatic cancers (59% compared to 24%). For symptomatic cancers, there is a statistically significant relationship between the proportion of EPG/GPG cancers and age at diagnosis; older women having a higher proportion of EPG/GPG cancers. Women aged less than 40 had the lowest proportion of EPG/GPG cancers (15%). Women aged 80 or over with screen-detected cancers had a significantly smaller proportion of EPG/GPG cancers than women with screen-detected cancers in the other age groups, but this was higher than in women in the same age group with symptomatic cancers. Across all deprivation quintiles, the proportions of surgically treated women with EPG/GPG cancers were significantly higher for screen-detected breast cancers (Table 7b). For women with symptomatic cancers, the proportion of EPG/GPG cancers increased from 20% in the most deprived quintile to 25% in the least deprived quintile, and women in the most deprived quintile were significantly less likely to have EPG/GPG cancers. Although the overall relationship between the proportion of early stage cancers and deprivation was not apparent for screen-detected cancers, women in the most deprived quintile with screen-detected cancers did have a significantly lower proportion of EPG/GPG cancers. Vascular Invasion Vascular invasion data were not available for Northern Ireland and Scotland. In England and Wales, vascular invasion was known for 37% of all invasive cancers and for 44% of surgically treated invasive cancers. The former varied from 9% in the Thames region to 84% in the Oxford region, and the latter from 10% in the Thames region to 93% in the West Midlands region (Appendix 3). TUMOUR CHARACTERISTICS 15

20 Tumour Characteristics Tumour Characteristics Age Band (years) Invasive Cancers Vascular Invasion Present All Total no. < % 40.8% % 35.0% 34.7% % 33.1% 25.7% % 32.0% 24.0% % 32.0% 29.4% % 30.4% 30.0% 1137 All ages 16.4% 33.4% 28.6% Screendetected Deprivation Quintile Invasive Cancers Vascular Invasion Present Screendetected All Total no. Q1 Most deprived 17.9% 32.9% 29.5% 1709 Q2 16.1% 34.3% 29.6% 2379 Q3 15.0% 33.0% 27.9% 3073 Q4 15.7% 32.1% 27.5% 3347 Q5 Least deprived 17.7% 35.0% 29.6% 3386 All 16.4% 33.5% 28.7% Tables 8a and 8b: Variation in the proportion of surgically treated invasive breast cancers with vascular invasion present with a) age and route of presentation and b) deprivation quintile and route of presentation expressed as a proportion of cancers with known vascular invasion Overall, 29% of surgically treated women diagnosed with invasive breast cancer in 2007 had vascular invasion present. The proportion of screen-detected cancers with vascular invasion present was significantly lower than for that for symptomatic cancers (16% compared to 33%) (Table 8a). The proportions of cancers with vascular invasion present decreased with increasing age for both presentation routes. Women aged less than 40 with symptomatic cancer had a significantly higher proportion with vascular invasion present (41% compared with 29% overall). Women aged 80 and over, with screen-detected or symptomatic cancer, had a lower proportion of cancers with vascular invasion present, but these differences are not statistically significant. The proportions of surgically treated women with invasive breast cancers with vascular invasion present were significantly lower for screen-detected cancers in all deprivation quintiles, but there was no clear trend in the presence of vascular invasion across the deprivation quintiles for either presentation route (Table 8b). Oestrogen Receptor Status (ER Status) Data on ER status were not available for Northern Ireland. For the remaining countries, ER status was known for 56% of all invasive cancers and 61% of surgically treated invasive cancers. The former varied from 32% in the Thames region to 96% in the West Midlands region, and the latter from 37% in the Thames region to 99% in the West Midlands region (Appendix 3). 16 TUMOUR CHARACTERISTICS

21 Tumour Characteristics Tumour Characteristics Age Band (years) Invasive Cancers ER Positive All Total no. < % 67.9% % 79.2% 80.0% % 73.1% 84.4% % 76.4% 86.9% % 79.7% 83.8% % 78.4% 79.1% 1162 All ages 90.0% 76.7% 83.8% Screendetected Deprivation Quintile Invasive Cancers ER Positive Screendetected All Total no. Q1 Most deprived 88.5% 75.5% 82.1% 3053 Q2 89.2% 74.9% 82.3% 3833 Q3 90.8% 76.9% 84.1% 4563 Q4 90.8% 76.7% 84.5% 4971 Q5 Least deprived 89.9% 78.9% 85.2% 4970 All 90.0% 76.7% 83.8% Tables 9a and 9b: Variation in the proportion of surgically treated ER positive invasive breast cancers with a) age and route of presentation and b) deprivation quintile and route of presentation expressed as a proportion of the cancers with known ER status Overall, 84% of surgically treated women diagnosed with invasive breast cancer in 2007 had ER positive tumours (Table 9a). The proportion of screen-detected ER positive cancers was significantly higher than that for symptomatic cancers overall (90% compared to 77%) and in every age group. There is a non linear relationship between age and ER positive status for both screendetected and symptomatic cancers. For screen-detected the highest proportion of ER positive cancers was in the relatively small cohort of women aged 40-49, but this difference is not statistically significant. The proportions of surgically treated women with ER positive invasive breast cancers were significantly higher for screen-detected cancers in all deprivation quintiles (Table 9b). For symptomatic cancers, the proportion of ER positive cancers increased significantly with decreasing deprivation. The proportion of ER positive invasive breast cancers was 75% in the most deprived quintile and 79% in the least deprived quintile. This relationship is not apparent for screen-detected cancers. Human Epidermal Growth Factor Receptor 2 Status (HER2 Status) Data on HER2 status were not available for Northern Ireland and Scotland. In England and Wales, HER2 status was known for only 43% of all invasive cancers and for only 50% of surgically treated invasive cancers. The former varied from 26% in the Thames region to 87% in the West Midlands region, and the latter from 30% in the Thames region to 92% in the West Midlands region (Appendix 3). TUMOUR CHARACTERISTICS 17

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